考虑热泵设置的换热网络分步改造及其多目标优化策略

doi:10.3969/j.issn.0438-1157.2014.10.031

化工学报 ›› 2014, Vol. 65 ›› Issue (10): 3976-3983.DOI: 10.3969/j.issn.0438-1157.2014.10.031

考虑热泵设置的换热网络分步改造及其多目标优化策略

康丽霞¹, 刘永忠^1,2

1 西安交通大学化工系, 陕西西安 710049;
2 热流科学与工程教育部重点实验室, 陕西西安 710049

收稿日期:2014-02-17 修回日期:2014-03-18 出版日期:2014-10-05 发布日期:2014-10-05
通讯作者: 刘永忠
基金资助:
国家自然科学基金项目（21376188）。

Step-by-step retrofit of heat exchanger network with heat pump installation and multi-objective optimization strategies

KANG Lixia¹, LIU Yongzhong^1,2

1 Department of Chemical Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China;
2 Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi'an 710049, Shaanxi, China

Received:2014-02-17 Revised:2014-03-18 Online:2014-10-05 Published:2014-10-05
Supported by:
supported by the National Natural Science Foundation of China (21376188).

摘要/Abstract

摘要： 为了研究热泵设置对换热网络系统节能和CO₂减排的综合影响，建立了以换热网络年度化的改造费用和新增CO₂排放量最小为目标的多策略分步改造的多目标优化模型。以酮苯脱蜡装置的换热网络改造为例，阐明了本文所提方法的有效性，并获得了经济性和CO₂排放量目标权衡的Pareto曲线。本文还对热泵在换热网络中的设置位置进行了讨论，对比和分析了换热网络优化、热泵设置和燃料替换3种改造策略的经济性、减排效果以及节能效果。该方法可为过程工业系统的节能和CO₂排放控制策略的制定提供理论依据。

关键词: 换热网络, 模型, 优化, 二氧化碳, 热泵, 燃料替换

Abstract: In order to investigate the comprehensive effects of heat pump installation on energy saving and CO₂ emission reduction in heat exchanger network (HEN) retrofit, a step-by-step multi-objective optimization model with combination of multiple strategies was proposed for HEN retrofit, in which the objective was to minimize the annual HEN retrofit cost and newly increased CO₂ emissions. A HEN retrofit problem of a benzol-ketone dewaxing unit was taken to illustrate the effectiveness of the proposed method. The Pareto fronts that represented the trade-offs between economy and CO₂ emission were presented. The location of heat pump installation in HEN was discussed. For the three retrofit strategies, the effects of economy, CO₂ emission and energy saving were compared and analyzed. The proposed method would provide theoretical fundamentals for formulating schemes of energy conservation and CO₂ emission control in process industries.

Key words: heat exchanger network, model, optimization, carbon dioxide, heat pump, fuel switching

中图分类号:

TQ021.8

康丽霞, 刘永忠. 考虑热泵设置的换热网络分步改造及其多目标优化策略[J]. 化工学报, 2014, 65(10): 3976-3983.

KANG Lixia, LIU Yongzhong. Step-by-step retrofit of heat exchanger network with heat pump installation and multi-objective optimization strategies[J]. CIESC Journal, 2014, 65(10): 3976-3983.

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考虑热泵设置的换热网络分步改造及其多目标优化策略

Step-by-step retrofit of heat exchanger network with heat pump installation and multi-objective optimization strategies

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